Now you need to assign DLT 147 to gtp via: Edit -> Preferences -> Protocols -> DLT_USER -> Encapsulations Table: Edit -> New -> DLT: User 0 (DLT=147) -> Payload protocol: gtp -> OK -> OK -> OKĪt this point, all the UDP filters should be easier to work with because you will only have a single UDP header now.Capture filters (like tcp port 80) are not to be confused with display filters (like tcp.port = 80). The former are much more limited and are used to reduce the size of a raw packet capture. The latter are used to hide some packets from the packet list.Ĭapture filters are set before starting a packet capture and cannot be modified during the capture. In the main window, one can find the capture filter just above the interfaces list and in the interfaces dialog.ĭisplay filters on the other hand do not have this limitation and you can change them on the fly. Wireshark filter by ip and port range how to#.Quit without Saving to discard the captured traffic. Close Wireshark to complete this activity.Observe that only traffic to (destination) or from (source) IP address 8.8.8.8 is captured.Use ping 8.8.4.4 to ping an Internet host by IP address.Use ping 8.8.8.8 to ping an Internet host by IP address.Select Start to start a Wireshark capture.In the Capture Filter box type host 8.8.8.8.Double-click on the interface you want to use for the capture.Select either the Capture menu and then the Interfaces dialog box or the List the available capture interfaces toolbar button.To capture network traffic using a capture filter: These activities will show you how to use Wireshark to capture and filter network traffic using a capture filter.Īctivity 1 - Capture Network Traffic Using a Capture Filter Wireshark is a free and open source packet analyzer used for network troubleshooting and analysis. 3 Activity 1 - Capture Network Traffic Using a Capture Filter.
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